PokerSolver
PokerSolver/6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs CO open 3bb

BB vs CO open 3bb

6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 20bb · CO opens 3bb · Big blind to act

6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.46bbYour cards?
1bb
3bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 63.9%Call 19.7%Raise 6bb 4.2%All-in 19.84bb 12.3%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO opens 3bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 20bb?

CO opens 3bb in 6-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 20bb: the big blind (BB) folds 63.9%, calls 19.7%, raises 6bb 4.2% and goes all-in 19.84bb 12.3%. Always call: A6s-A9s, A4s, K9s, K2s-K5s, Q9s, Q5s-Q7s, Q2s, J7s, T6s-T8s, 96s-97s, 85s+, 75s+, 64s+, 53s+, A8o-A9o, K9o-KJo, QTo+. Always raise 6bb: QQ+, AKs, ATs. Always all-in 19.84bb: 22-TT, AJs, A2s, KJs+, QJs, JTs, ATo-AQo, KQo. Mixed: JJ, AQs, A5s, A3s, KTs, K6s-K8s, QTs, Q8s, Q4s, J8s-J9s, J4s-J5s, T9s, 98s, 52s, 43s, AKo, A5o-A7o, K8o, Q9o, J8o+.

Always fold
Q3s, J6s, J2s-J3s, T2s-T5s, 92s-95s, 82s-84s, 72s-74s, 62s-63s, 42s, 32s, A2o-A4o, K2o-K7o, Q2o-Q8o, J2o-J7o, T2o+, 92o+, 82o+, 72o+, 62o+, 52o+, 42o+, 32o
Always call
A6s-A9s, A4s, K9s, K2s-K5s, Q9s, Q5s-Q7s, Q2s, J7s, T6s-T8s, 96s-97s, 85s+, 75s+, 64s+, 53s+, A8o-A9o, K9o-KJo, QTo+
Always raise 6bb
QQ+, AKs, ATs
Always all-in 19.84bb
22-TT, AJs, A2s, KJs+, QJs, JTs, ATo-AQo, KQo
Mixed
JJ, AQs, A5s, A3s, KTs, K6s-K8s, QTs, Q8s, Q4s, J8s-J9s, J4s-J5s, T9s, 98s, 52s, 43s, AKo, A5o-A7o, K8o, Q9o, J8o+
Settings: 6-max · 20bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 20bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.9). A jackpot fee on bigger pots is not in this solve, so lines that build big pots may be slightly too loose. Bet sizes are the solved ones; a size that is not here plays like the nearest one.

Fits exactly: no game we have checked.

Close: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: the ante from 93 of our own CoinPoker hands at $0.25/$0.50 with a $0.08 ante, played 2026-09-30; the caps and the preflop rule from coinpoker.com/games/texas-holdem/, fetched 2026-10-31.